Provide better advice on using gdb with debuggerd on crashed applications.

Let CyanogenMod developers know of a Cyanogen enhancement made by
Clark Scheff and Steve Kondik where the graphical debugger
interface ddd can be used with crashed applications. The new in-line
function, dddclient, is now available in addition to the std Google
gdbclient interface.

Also, let users know that they have set their property debug.db.uid
too low to enable debuggerd to wait for gdb to attach.

If they haven't set debug.db.uid; let them know; and offer a hint
on how to do it, without their having to Google for the web page.

Change-Id: I467d861c0fffe34e8532a8bc7cf7bfdab9f56447
Signed-off-by: Pete Delaney <piet@cyngn.com>